Corner piece for mattresses and the production method thereof

ABSTRACT

Specifically conceived for mattresses with springs ( 4 ), the mattress consists of a cylindrical tubular body ( 1, 1 ′) with a longitudinal cut line ( 2 ) in correspondence with one of its lines of symmetry, that connects its two open ends, towards which open a number of wide notches ( 3, 3′ ), with an isosceles trapezoid configuration that, together with the longitudinal opening ( 2 ) allow the male-female coupling of the corner piece to the springs ( 4 ) of the mattress, externally closing the set of springs at the corresponding corner to provide a smooth, continuous surface without any bulges, recesses or deformations.

OBJECT OF THE INVENTION

The present invention relates to a piece that has been specificallyconceived to be used as a corner piece at each vertex or corner of amattress, particularly suitable for being used in spring mattresses, sothat it shares the elastically deformable nature of the mattress coreand is easily attachable to the corners of the mattress, preventing thetypical bulges, recesses or deformations that generally appear in theseareas of spring mattresses.

BACKGROUND OF THE INVENTION

Mattresses of the aforementioned type generally comprise a spring casingin which a number of spring units, generally helical in shape, aresuitably connected to each other while being disposed between toimaginary planes parallel to the bases of the mattress. Morespecifically, these spring units are coplanar on their ends, where theyare attached to padded bodies that line the core of the mattress on itstop and bottom, softening the physical contact with said springs andthereby increasing the comfort of the mattress for the user.

A similar padded lining is present around the entire perimeter of themattress, where the result is less effective as the deformability ofthese areas is greater, particularly so in the corners, where bulges,recesses, deformations or wrinkles often appear that harm the appearanceof the mattress.

DESCRIPTION OF THE INVENTION

The corner piece for mattresses disclosed by the invention solves theabove-described problem in a fully satisfactory manner, and consists ofa tubular body made of polyethylene, equal in length to the thickness ofthe spring core of the mattress, with deep notches established at itsopen ends and a longitudinal slit along one of its lines of symmetry, sothat this polyethylene part can adapt itself and be attached to thesprings of the mattress at its corners, providing at each corner anexternally smooth and perfectly cylindrical surface that reduces theelastic deformability of the mattress at the corresponding corner, whilealso greatly enhancing its appearance.

As regards the method for constructing said polyethylene corner piece,it involves using a tubular cylindrical part obtained by extrusion,which is cut along one of its lines of symmetry allowing it to beextended, to turn it into a laminar flat body in the cutting stage inwhich the end notches are obtained, finally recovering its originalthree-dimensional or cylindrical shape by simple elastic recovery of itsmaterial.

DESCRIPTION OF THE DRAWINGS

As a complement of the description being made, in order to aid a betterunderstanding of the characteristics of the invention, according to anexample of a preferred embodiment, the present description isaccompanied by a set of drawings as an integral part of it where, forpurposes of illustration only and in a non-limiting sense, the followingis shown:

FIG. 1 shows a perspective view of a mattress corner piece made inaccordance with the object of the present invention.

FIG. 2 also shows a perspective view of the corner piece of the previousfigure, duly coupled on one of the corners of a spring mattress.

FIGS. 3, 4 and 5 show, respectively, a profile, elevation and plan viewof another preferred embodiment of the invention.

FIG. 6 shows, finally, a perspective view of the same corner piece ofthe previous figure duly coupled on each of the corners of a springmattress.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the above-described figures, it can be seen that the cornerpiece for mattresses disclosed by the invention is comprised of atubular body (1), preferably of polyethylene and obtained by extrusion,with a configuration tending towards a cylinder and a considerable wallthickness, the tubular body (1) being open by a longitudinal slit (2)placed in correspondence with one of its lines of symmetry, to allow bymeans of its elastic deformation to temporarily convert it into alaminar flat body that in a cutting stage is provided with large notches(3) on its ends, preferably having the isosceles trapezoid shapeparticularly visible in FIG. 2, so that at the end of this cutting stagefor obtaining the notches (3), the elastic recovery of the body (1)makes it regain its original tubular or three-dimensional configuration,as in either FIG. 1 or 2.

The axial length of the tubular body (1) shall be that suitable for thethickness of the mattress, as can be inferred from FIG. 2, and thenotches (3) of its ends are meant to facilitate, together with thelongitudinal slit (2), the coupling of the corner piece to the springs(4) that participate in the mattress, each corner piece (1) naturallybeing placed at each vertical edge of the mattress, helping toelastically stiffen said edges as they cover their surface and providean aesthetic finish, as well as helping prevent their deformation.

Likewise, in another preferred embodiment of the invention a tubularbody (1′) is provided with a configuration tending towards a cylinder asin the previous case, also preferably made of polyethylene and obtainedby extrusion, the tubular body (1′) also being open by a longitudinalslit (2) placed in correspondence with one of its lines of symmetry.

However, in this embodiment the tubular body (1′) is provided withnotches (3′) on its ends, preferably having an isosceles trapezoidconfiguration with an oblique cut, truncation or bevel (5) at thevertices corresponding to the greater base of the trapezoid locatedfarthest away from the longitudinal slit, as shown in FIGS. 3 to 6,which allow improving the flexion of the tubular body and thus of thecorners of the mattress, so that their stiffness is close to or similarto that of the rest of the mattress. In addition, under and near saidbevels (5) the body (1′) has cut-outs or orifices (6) that aid in thedeformation or flexion of the body (1′) in a vertical sense, due to thepresence of a narrow strip between the upper edge of the body (1′) andthe aforementioned cut-outs (6) that flexes easily.

1. Mattress corner piece, specifically conceived for spring mattressesand meant to be adapted and attached to said springs at each corner ofthe mattress, participating as a means of elastic deformation, helpingto improve the external appearance of the mattress, characterised inthat it consists of a tubular part (1, 1′), preferably cylindrical, madeof polyethylene, having a slit (2) in correspondence with one of itslines of symmetry and wide notches (3, 3′) open towards the ends oropenings, so that by means of said slit (2) and by means of the notches(3, 3′) the part (1, 1′) is coupled to the springs (4) of the mattressin the corresponding corner of the latter.
 2. Construction method for acorner piece for mattresses as claimed in claim 1, characterised in thatin a preferred embodiment of the invention the aforementioned tubularpart (1′) has oblique cuts or bevels (5) at the vertices of the notches(3′) that are more distant from the slit (2) and has cut-outs ororifices (6) located under said cuts (5) that allow the flexion of thetubular part (1′) and thus of the mattress corner in which participatessaid tubular body (1′).
 3. Construction method for a corner piece formattresses as claimed in claim 1, characterised in that theaforementioned tubular part (1) is obtained by extrusion of apolyethylene tube that is subsequently subjected to an opening maneuverby means of a longitudinal cut made in correspondence with one of itslines of symmetry, and then subjecting said tubular body to adeformation until a flat configuration is obtained that allows obtainingby cutting the cut-outs on its ends, the body finally recovering itsoriginal tubular configuration by the elastic recovery of the materialthat it is made of.
 4. Construction method for a corner piece formattresses as claimed in claim 2, characterised in that theaforementioned tubular part (1) is obtained by extrusion of apolyethylene tube that is subsequently subjected to an opening maneuverby means of a longitudinal cut made in correspondence with one of itslines of symmetry, and then subjecting said tubular body to adeformation until a flat configuration is obtained that allows obtainingby cutting the cut-outs on its ends, the body finally recovering itsoriginal tubular configuration by the elastic recovery of the materialthat it is made of.